Cephalometric Analysis of Growth and Treatment with “the Structural Technique: A review of its background and clinical application
Ib Leth Nielsen
The aim of this review is to provide the fundamental basis and scientific evidence for the so-called “Structural Technique.” In this article we will discuss the benefits and challenges this technique presents and compare it to the so-called “best fit” technique. Furthermore, we will introduce the three parts of the analysis, most commonly used for evaluation of growth and treatment changes. The “Structural technique” developed by Professor Arne Björk and his associate Dr. Vibeke Skieller is the result of their longitudinal studies using metallic implants as biological markers.
Surgical Occlusion Setup in Orthognathic Surgery Using Surgery-first Approach for Skeletal Class III Deformity: A Systematic Review
Shu Hsien Lo, DDS, Yu-Fang Liao, DDS, PhD
Surgery-first orthognathic surgery is increasing in popularity because of reduced treatment time, efficient tooth decompensation, and early improvement in facial esthetics. However, it remains difficult due to the surgical occlusion setup. We systematically reviewed the literature in order to determine the guidelines used for surgical occlusion setup in orthognathic-first surgery for skeletal Class III deformity.
Maxillary Expansion: From Past to Present
Shih-Chieh Chen, Hong-Po Chang, Yu-Chuan Tseng
Maxillary expansion is a common treatment option for upper crowded dentition and posterior lingual crossbite in children and adolescents. As the midpalatal suture is not yet completely interlocked at these ages, the midpalatal suture can be opened via maxillary expansion to increase the length and width of the upper arch. This solves the problems of posterior crossbite and upper crowded dentition. Since the midpalatal suture is stiff in adults, many clinicians believe that adults require surgical intervention to achieve maxillary expansion. However, recent reports indicated that several cases have been treated successfully with the aid of TADs for maxillary expansion. This article discusses the various protocols for performing maxillary expansion from past to present.
Curve of Spee: Development and Orthodontic Leveling
Yu-Hsin Lee, Yu-Chuan Tseng
Curve of Spee (CoS) is characterized as human occlusal curvature viewed in the sagittal plane. This naturally occurring phenomenon has clinical importance in orthodontics and prosthodontic dentistry. The purpose of this article is to examine the formation of the CoS regarding of when, how, or why the CoS develops. The mechanism of leveling the CoS was discussed.
Correction of Bimaxillary Protrusion by Extraction of Incisors and Canine Substitution
Chung-Li Wang, Chun-Liang Kuo, I-Hua Liu, Chun-Hsiu Yang
The maxillary six anterior teeth play important roles in esthetics and functions. Treatments for missing maxillary lateral incisors either by space closure or space preservation need multiple clinical considerations. This case report presents an orthodontic treatment of a 33-year-old female patient who had a convex profile with lip incompetence, missing lower molars and poor prognosis of bilateral maxillary lateral incisors. The atypical extraction in treatment plan consisted of removing lateral incisors instead of premolars to retract the anterior teeth. The improvement of facial profile and lip posture was achieved and the anterior teeth esthetics was further rehabilitated with prosthesis. After 28-month of treatment duration, the patient was satisfied with treatment results.
Considerations on Facial Growth and Oral Function with the use of High Pull Headgear
Shao-Chun Yang, Ming-Jeaun Su, Yuen-Yung Tsang, Huei-Mei Tsai
High pull headgear with face bow has been a popular treatment modality for upper first molars distalization and anchorage enhancement. It can effectively stop the eruption of upper molars, allow condylar growth to contribute a forward movement of the mandible and further improve the bite and lip incompetency. The compliance from patients is particularly important to growing children.
The patient was an 11 years old boy with symptoms of Class II division 1 malocclusion. Patient’s growth spurt seemed to be not over for at least one year. Lip biting and thumb sucking habits were suspected as the causes of patient’s malocclusion. A combination of anterior bite turbo, which is a convenient alternative for a bite plate, pre-adjusted appliances and high pull headgear were applied. Lip training exercise was equally indispensable. Steady occlusion was achieved. Soft tissue profile improvement and oral function recovery were also satisfactory.